Electric switch.



PATENTED OCT. 4, 1904.

G. E. LOMBARD.

ELECTRIC SWITCH. APPLICATION FILED SEPT. 19, 1903.

N0 MODEL.

INVENTOR. CbarlesBLombard. BYBL A 1 Wi'TNESSES 64 .7?

ATTORNEY.

NO. 771,313. Patented October 4, 1904.-

UNITED STATES PATENT OFFICE.

CHARLES E. LOIIIBARD, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO STANLEYELECTRIC MANUFACTURING COMPANY, OF PITTSFIELD, MAS- SACHUSETTS, ACORPORATION OF NEW JERSEY.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 771,313, dated October4;, 1904. Application filed September 19,1903. Serial No. 173,767. (Nomodel.)

$077107 it y wcrn: E, which in turn engages a gear in upper Be it knownthat I, CHARLES E. LOMBARD, gear-case G, which in turn engages upper roda citizen of the United States, and a resident E. Thus as handle H ismoved either up or of Pittsfield, Massachusetts, have invented down rodsE E are moved forward or back,

5 certain new and useful Improvements in Electurning members D D ontheir pivots and tric Switches, of which the followingis a specicausingthem to engage with either set of confication. tacts c 0. 55

My invention relates to electric switches, By pivotingtheswitchmembersDDattheir and particularly to switches for the purpose centers byvertical pivots I securetwo breaks IO of interrupting electric circuitscarrying curof the circuit by each of switch members D,

rents of high potential. If it is attempted to these breaks all being ina horizontal direcbreak such a circuit in air, serious arcing retion. Ihave found that an arc produced by 60 sults, which burns theswitch-contacts. This a horizontal break in oil is much more quickly notonly reduces the life of the switch, but extinguished than an arcproduced by a verprevents good electrical contact when the tical break,since in the former case the oil switch is again closed. It has beenfound tends to lift the arc in a direction at right anthat by immersingthe switch-contacts in oil gles to its length and quickly extinguishesit. 5 or other insulating fluid the arc is much more I is a slab ofmarble or other insulating maquickly interrupted and far less damage isterial covering the tank A and protecting the done to the switch.Accordingly oil-switches oil from dust, 860. J is another horizontalhave been used for some time for breaking plate of insulating materialwhich is subelectric circuits carrying current of high pomerged in theoil above the contacts 0 0. 7

tential. This plate J is placed at a sufficient distance The object ofmy invention is to provide a above contacts 0 c to allow the arc to becarswitch of this character which shall be more ried upward freely bythe oil, so that it may efficient in extinguishing the arcs and which bequickly extinguished; but it prevents the shall at the same time requireasmaller splashing at the surface of the oil which is 75 amount of oilthan in the case of such switches caused by the arc in switches asordinarily as ordinarily built. constructed unless the depth of oil isvery Referring to the drawings, Figure 1 shows great. Thus by the use ofthis horizontal a plan view of a switch constructed in accordplate J, Iam able to use a shallow oil-reserance with my invention, part of thecovervoir, while at the same time permitting the 8 plate being brokenaway. Fig. 2 shows a are to be carried upward by the oil, and thus sideelevation of the same, partly in crosssecuring the benefit of thehorizontal break 3 5 section. which I have provided.

A A represent tanks or reservoirs for oil, I do not desire to limitmyself to the parwhich are supported by the frame B. c c are ticularconstruction and arrangement of parts 8 5 contacts submerged in the oiland adapted to here shown, since changes therein which do be engaged bythe movable switch members not depart from the spirit of my invention DD. These switch members are pivoted at and which are within the scope ofthe appendtheir center and carry rigidly attached to ed claims will beobvious to those skilled in the themselves the arms (Z (Z. These arms (Z(Z are art. 9 slotted at their ends, and the slots are en- Having thusfully described my invention, gaged by pin 0. Pin a is carried by thelon- I claim as new and desire to protect by Letgitudinally-movable rodE. Rods E E are ters Patent given their longitudinal movementbythehan- 1. In combination, a reservoir containing dle H, which carrieson its shaft a gear enoil, contacts submerged therein, a pivoted gagingthe lower rod E and the vertical rod switch member movable in ahorizontal plane oil, contacts immersed therein, a pivoted switch membermovable in a horizontal plane and adapted to engage said contacts, anarm carried by said member, a longitudinally-movable rod, and a pincarried by said rod and engaging said arm.

Signed at Pittsfield, 1\/Iassachusetts,this 14th day of September, 1903.

CHARLES E. LOMBARD. Witnesses:

L. A. HAWKINS, E. L. WHITEHEAD.

